Journal article
Electrical-Polarization-Induced Ultrahigh Responsivity Photodetectors Based on Graphene and Graphene Quantum Dots
Advanced functional materials, v 26(4), pp 620-628
26 Jan 2016
Abstract
Hybrid quantum dot-graphene photodetectors have recently attracted substantial interest because of their remarkable performance and low power consumption. However, the performance of the device greatly depends on the interfacial states and photogenerated screening field. As a consequence, the sensitivity is limited and the response time is relatively slow. In order to circumvent these challenges, herein, a composite graphene and graphene quantum dot (GQD) photodetector on lead zirconate titanate (Pb(Zr0.2Ti0.8)O-3) (PZT) substrates has been designed to form an ultrasensitive photodetector over a wide range of illumination power. Under 325 nm UV light illumination, the device shows sensitivity as high as 4.06 x 10(9) A W-1, which is 120 times higher than reported sensitivity of the same class of devices. Plant derived GQD has a broad range of absorptivity and is an excellent candidate for harvesting photons generating electron-hole pairs. Intrinsic electric field from PZT substrate separates photogenerated electron-hole pairs as well as provides the built-in electric field that causes the holes to transfer to the underlying graphene channel. The composite structure of graphene and GQD on PZT substrate therefore produces a simple, stable, and highly sensitive photodetector over a wide range of power with short response time, which shows a way to obtain high-performance optoelectronic devices.
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Details
- Title
- Electrical-Polarization-Induced Ultrahigh Responsivity Photodetectors Based on Graphene and Graphene Quantum Dots
- Creators
- Golam Haider - National Tsing Hua UniversityPrathik Roy - National Taiwan UniversityChia-Wei Chiang - National Taiwan UniversityWei-Chun Tan - National Taiwan UniversityYi-Rou Liou - National Taiwan UniversityHuan-Tsung Chang - National Taiwan UniversityChi-Te Liang - National Taiwan UniversityWei-Heng Shih - Drexel UniversityYang-Fang Chen - National Taiwan University
- Publication Details
- Advanced functional materials, v 26(4), pp 620-628
- Publisher
- Wiley
- Number of pages
- 9
- Grant note
- 104R890932 / Ministry of Education of the Republic of China; Ministry of Education, Taiwan NSC102-2112-M-002-008-MY3 / Ministry of Science and Technology of the Republic of China; Ministry of Science and Technology, China; Ministry of Science and Technology, Taiwan Taiwan International Graduate Program, Institute of Physics, Academia Sinica Ministry of Science and Technology of the Republic of China; Ministry of Science and Technology, China; Ministry of Science and Technology, Taiwan
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000368886000017
- Scopus ID
- 2-s2.0-84981187573
- Other Identifier
- 991019167449604721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Multidisciplinary
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology
- Physics, Applied
- Physics, Condensed Matter